play/play — pull request #134 by maddox (2012-04-10 22:15:29+00:00)
Title: User auth

This adds user authentication to requests made as a client. Play's API is used throughout the entire app whether its front end or general API requests, so authentication has to be smart.

## API Auth

Each user on Play has a unique auth `token`. They will give this `token` to each Play client for it to make requests on their behalf.

In addition to these unique tokens, each Play installation also has its own unique system wide auth `token`. This can be used to auth and masquerade as any user on the system. When using this system wide `token`, a `login` must be provided in the request so Play knows what user the request is masquerading as.

Both of these items can be included as a header or as a query param.

### User Token

When using a user's `token`, only the `token` needs to be included. It can be added to the request in the header or as a query param.

#### Query Param

?token=5422fd

#### Header

"Authorization: 5422fd"

### System Token

When using a system token, a `login` needs to be added to the request in addition to the system `token` added by the means described above. It can be added to the request in the header or as a query param.

#### Query Param

?login=maddox

#### Header

"X-PLAY-LOGIN: maddox"